Hooked tool for turning over ends of rivets



Oct. 18, 1949;

G. R. PHILLIPS HOOKED TOOL FOR TURNING OVER ENDS 0F RIVETS Filed Dec. 13, 1945 IN VEN TOR.

g TOjP/VEY Patented Oct. 18, 1949 HOOKED TOOL FOR TURNING. OVER ENDS- OF RIVETS George R. Phillips,

to Foster D. Snell, York Application New Brunswick, N.

1110., a; corporation .15., assignor of New December 13, 19.46, Serial No. 715,967

4 Claims. (Cl. 218 -19) This invention relates t a crimping device for eyelets such as the metal grommets-inserted as hollow bushings through holes in. sheet material and then crimped. The invention relates, particularly, to a device or machine for blind crimping in which case the eyelet is accessible only from the outside as in crimping eyelets inserted through applied upholstery fabric. In this case the crimping device must be adapted to be inserted through the eyelet from the outside. It must include an anvil against which the outer end of the eyelet is held, a peening head to be inserted through the eyelet, and means ior retract.- ing the head in the direction of the anvil so that the end of the eyelet is upset.

The invention will be illustrated by description. in connection with the attached drawings to which reference is made.

Fig. 1 is a side view partly in section of the crimping device showing the opera ing head inserted through an eyelet in a thin sheet.

Fig. 2 is a sectional view on line 2'-2- in the direction of the arrows.

Fig. 3 is a view similar to that of Fig. 1 except that the peening head is in. the crimping position.

Fig. 4 is a top plan view of a part bly of Fig. 1.

There is shown a crimping machine having body portion Ill, nose l2 and peening head M, a fabric l5, and eyelet H.

The nose and body are continuous with each other and the body, at its place of meeting the nose, is suitably shaped into an anvil portion l6 which extends around the base of the nose.

The body is of larger cross section than the nose and is provided with a longitudinally extending hole through which extends the plunger [8. Likewise the nose is provided with a slot opening on the side of the nose and alined with the said hole and of a width equal to the radius of said hole, this slot, shown at 20, receiving one end of the said plunger. It will be noted, as in Figs. 1 and 4, that the slot 20 and therefore the plunger [8 are offset with respect to the center line of the nose. The slot extends into the nose, from a side thereof, only to a distance equal approximately to the diameter of the plunger.

The peening head 22 at the forward end of the plunger is generally hook-shaped.- Its width from the outside of the hook to the opposite edge, which is in line with an edge of the plunger, is no greater than and ordinarily is approximately equal to the maximum width of the nose l2. As shown, the peening head, when turned over the of the assem- 42 is. pressed manually in nose as in Fig. 1, terminates at a position not beyond the side of the nose.

Means are provided for rotating and also retracting the plunger within the said hole and groove.

The rotation is effected by the lever element" 24 that is suitably in the form of a half wing nut fitted over that end 26 of the plunger that extends through and beyond the body member HI. This fitting of the wing nut to the end of the plunger is effected by a squared portion 28 of the plunger holding the lever in substantially nonrotatable manner upon the plunger 18 and by the nuts 30 and 32' between which the wing nut is mounted so as to prevent its longitudinal movement.

When the half wing nut 24 is in the position shown by the solid lines of Fig. 1, then the peening head 22 extends over the nose of the crimping device and adapts the operating head of the device for insertion through the eyelet as shown in this figure. When the wing nut is rotated through to the position shown in the dotted lines 34 of Fig. 1, then the peening head is rotated also through 180 to the position of the dotted lines 36 in Fig. 1 or as shown also in Fig. 3.

Extending from the nose of the machine is a stop 38 against which the hook strikes when rotated to the closed position in which the hook extends over the nose and is in position for insertion through an eyelet.

Means for retracting the plunger with respect to the nose and the body of the machine, thus retracting also the peening head when extended to one side as shown in Fig. 3, include a pair of handles extending, as shown, in direction generally longitudinal with respect to the direction of extension of the plunger l8. One of these handles 4'0 is continuous with the body and the other 42 is mounted pivotally, as shown at 44, upon the handle 40. This handle at a midportion Mi contacts the nut 32 which is threaded and screwed on the plunger. When the handle the direction of 40, as to the position shown in Fig. 3, then the part 46 forces the. nut. 32 against spring. pressure and also the lower. end of the plunger in the direction that is downward in the figures and causes. the peening head to approach the anvil and upset the eyelet as shown in Fig. 3.

Means are provided for returning the plunger normally to the extended position shown in Fig. 1 in which the peening head extends above the nose of the machine, either directly above as 4 shown in the solid lines or to the side as shown and provided with a hole in line with the slot, in dotted line 36 of Fig. 1. These means include an anvil portion of the body disposed around the spring 48, means mounting the spring upon the base of the nose, a plunger mounted slidably and first mentioned handle as by screws 50, and rotatably within the said hole and slot and exlargely v d m the description that has extend over the end of the nose and to one side The y lets ar insert d in th p sition n when the head extends to the said one side, to- W eh t y are o be erl'mped, that is, through wards and near to the anvil, so as to provide the pr fo m d ho in sheet material- With the desired crimping action, the peening head being rotated to cause the peening head to extend to respect to t center line of th se the position shown in the dotted line of Fig. 1, 2 A crimping machine as d ribed in claim 1,

and then the handles are squeezed together, to R0 the Said slot extending t t nose from one cause the retrac of the plunge! and Defining side thereof only to a depth approximately equal head to the position shown in to the diameter of the plunger and the peening The pressure of the handles is then released, head being generally hook-shaped and of width the half win nut rotated slightly to bring the not greater than the width of the said nose, so

umference, When the crimping is completed, 3. A crimping device as described in claim 1,

size to receive or permit withdrawal of the nose t t end pjvotally on th e handle continuous itsel with the body, a stop on the plunger, and an p u 8 and O the D 4 of the Second hallthe said other one of the handles forced 1n the d e, so that n he h d pressure 15 released direction of the handle continuous with the body, from the han the handles become fully P- he stop and attached plunger are retracted arat d and th plun r omes to t nd above within the said body of the machine so that the 1. 4. A crimping device as described in claim 3, Materials of construction of the various parts including a spring member and means mounting of kind ordinarily used in such parts. Thus the spring member at one end on the said stop the spring may be of spring steel d other pa ts and at the other end on the handle continuous of the device of steel, stainless steel, or relatively with th aid b dy, s that the spring applies hard brass. force holding the peening head normally in fully The device is dependable in operation and is te ded position beyond the said nose.

convenient in efiecting blind crimping in which GEORGE R. PHILLIPS.

the peening head must be inserted from the outside through the eyelet and caused to extend over REFERENCES CITED The following references are of record in the file of this patent:

ample of the invention herein chosen for the UNI ED STATES PA'I'ENTS purpose of illustration which do not constitute Number Name Date departures from the spirit and scope of the m- 1,476,756, Junkers Dec. 11, 1923 vention' 1,809,154 Becker June 9, 1931 What claim 2,276,498 Lear Mar. 17, 1942 1. A crimping machine for upsetting metal and 2 365 648 Rossman Dec 19 1944 like eyelets comprising a nose provided with a n longitudinally extending slot opening on one side FOREIGN PATENTS only of the nose, said nose being of a size to pass Number Country Date through the eyelet, a body of the machine con- 423,342 Great Britain May 10 1935 tinuous with the nose but of larger cross section 

